CVE security advisories and vulnerability history for FortiOS by Fortinet.
Last updated
Fortinet FortiOS has 272 published CVE records since 2005, of which 18 are in CISA's Known Exploited Vulnerabilities catalog and 27 have a known public exploit. The average CVSS base score across scored CVEs is 5.9.
This page aggregates every publicly disclosed vulnerability (CVE) affecting Fortinet FortiOS, with a severity breakdown, the affected and patched versions, the most common weakness types, and the full CVE list.
How the CVSS severity of Fortinet FortiOS's CVEs breaks down, plus how many are exploited in the wild or have public exploit code.
61 additional CVEs have no CVSS severity score.
In CISA’s Known Exploited Vulnerabilities catalog
18
18 of Fortinet FortiOS's CVEs are confirmed exploited in the wild.
Public exploits
27
27 of Fortinet FortiOS's CVEs have a known public exploit available.
Browse every Fortinet FortiOS version named in a CVE, then pick one to see only the CVEs that affect it.
272 CVEs
Added to CISA KEV 2026-01-27
Added to CISA KEV 2025-12-16
Showing 30 of 272
The CWE weakness categories most often found in Fortinet FortiOS CVEs. Follow any weakness for its full explanation.
How many Fortinet FortiOS CVEs were published each year.
Browse vulnerabilities for other products by Fortinet.
Common questions about Fortinet FortiOS vulnerabilities.
Fortinet FortiOS has 272 published CVE records since 2005.
Yes — 18 of Fortinet FortiOS's CVEs are listed in CISA's Known Exploited Vulnerabilities catalog, confirmed exploited in the wild and carrying a CISA remediation deadline.
Yes — 27 of Fortinet FortiOS's CVEs have a known public exploit.
196 distinct Fortinet FortiOS versions are named across its CVEs. Use the version filter above to see the CVEs affecting a specific version.
Fortinet FortiOS's CVEs most often map to these CWE weakness types: CWE-121 (Stack-based Buffer Overflow), CWE-134 (Use of Externally-Controlled Format String), CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')), CWE-787 (Out-of-bounds Write).
Fortinet FortiOS has 16 critical and 41 high-severity CVEs.
The average CVSS base score across Fortinet FortiOS's scored CVEs is 5.9.
Vulnerability data is sourced from the CVE Program; severity, KEV, and exploit signals are aggregated by RadicalNotion.AI.
Monitor new Fortinet FortiOS vulnerabilities as they are disclosed, with AI-written analysis and remediation guidance.
